Dell Force10 C150 Configuration Manual page 263

Change BGP timers
Use either or both of the following commands in the CONFIGURATION ROUTER BGP mode to
configure BGP timers.
Command Syntax
neighbors {
ip-address |
} timers
peer-group-name
holdtime
timers bgp
keepalive holdtime
show config
Use the
bgp
command in EXEC Privilege mode to view non-default values.
Timer values configured with the
timers bgp
command.
When two neighbors, configured with different
resulting values will be as follows:
• the lower of the
• whichever is the lower value; one-third of the new
the new
keepalive
BGP neighbor soft-reconfiguration
Changing routing policies typically requires a reset of BGP sessions (the TCP connection) for the policies
to take effect. This type of reset causes undue interruption to traffic due to the hard reset of the BGP cache
and the time it takes to re-establish the session.
BGP soft reconfiguration allows you to re-apply policies to a session without resetting the BGP session.
You can perform soft reconfiguration on a per-neighbor basis for either inbound or outbound policies. BGP
soft reconfiguration clears and reapplies policies without resetting the TCP connection.
Command Mode
CONFIG-ROUTER-
BGP
keepalive
CONFIG-ROUTER-
BGP
command in CONFIGURATION ROUTER BGP mode or the
neighbor timers
values is the new
holdtime
value.
Purpose
Configure timer values for a BGP neighbor or peer
group.
• keepalive range: 1 to 65535. Time interval, in
seconds, between keepalive messages sent to the
neighbor routers. (Default: 60 seconds)
• holdtime range: 3 to 65536. Time interval, in
seconds, between the last keepalive message and
declaring the router dead. (Default: 180 seconds)
Configure timer values for all neighbors.
• range: 1 to 65535. Time interval, in
keepalive
seconds, between keepalive messages sent to the
neighbor routers. (Default: 60 seconds)
• range: 3 to 65536. Time interval, in
holdtime
seconds, between the last keepalive message and
declaring the router dead. (Default: 180 seconds)
command override the timer values configured with the
and values, negotiate for new values, the
keepalive holdtime
value, and
holdtime
value, or the configured
holdtime
Border Gateway Protocol IPv4 (BGPv4) | 263
show running-config
value is
keepalive